Gustav Dannreuther (July 21, 1853 – December 19, 1923) was a violinist and conductor from Cincinnati, Ohio. In 1871, at the age of 18, he was sent to the Berlin University of the Arts, where he studied violin under Heinrich de Ahna and famed violinist Joseph Joachim.He left the school in 1874, spent six months in Paris, and then publicly taught and played in London until 1877. Later, until 1880, he was a member of the Mendelssohn Quintette Club of Boston, traveling through the United States, and Canada, including Newfoundland. Dannreuther and his ensemble's high musical standards contributed to the establishment of Chamber music concerts in the United States.